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HHC file extension

The table below provides useful information about the .hhc file extension. It answers questions such as:

  • What is the .hhc file?
  • What program do I need to open a .hhc file?
  • How can the .hhc file be opened, edited or printed?
  • How can I convert .hhc files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ HTML Help Table of Contents

HHC file is a HTML Help Table of Contents. The Help Table of Contents (HHC) file is an HTML file that contains the topic titles for your table of contents. When a user opens the table of contents in a compiled help file (or on a Web page) and clicks a topic title, the HTML file associated with that title will open.
Application: Microsoft HTML Help
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
HHC aliases:
HHC related links:
HHC related extensions:
Windows Help File

Hypertext Markup Language Document

Compiled HTML Help

HTML Help AutoIndex

HTML Help Project

HTML Help Stop Words

Microsoft Sharepoint Site Template

HTML Help Collection

Microsoft Sharepoint Web Part Description

Microsoft Sharepoint Document Set Index

Other types of files may also use the .hhc file extension.

🚫 The .hhc file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ghc, hbc, hc, hch, hgc, hh, hhd, hhs, hmc, hnc, htc, hyc, mhc, thc

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Homebanking Computer Interface
Oracle HyperHub Subkit
Adobe RoboHelp Visual Basic Constant Map
AbleCommerce Wizard Theme Configuration
NoteCenter Notes Document
HTML Help Header File
SQL HyperBac Compressed Archive
HTML Component
High Resolution Continuous-tone TIFF Image

🔴 Can't open a .hhc file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .hhc file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .hhc file extension, write to us!

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